| Factors Precisely |
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| A
factor of improvement is different |
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| than a
percent improvement … |
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| • | factor = new_rate/old_rate |
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| • | percent = 100 x (new_rate-old_rate)/old_rate |
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| • | Expressing
an improvement by it’s |
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| factor
is easier, esp. for large changes |
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| • | El Guerrouj’s 7% improvement over Bannister |
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| is a 1.07 factor of improvement |
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| Indy
500: 1911 Harroun 74.59mph; 2002
Castroneves 166.5mph |